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JP2018004337

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DESCRIPTION JP2018004337
Abstract: The present invention provides a vessel and a method of acquiring acoustic data of the
vessel, wherein the incidental equipment is compact and the acoustic device can be arranged in
the water by simple operation. SOLUTION: An arm 4 composed of a long part 5 having an
acoustic device 3 at its tip and a bent part 6 connected to the long part 5 is inclined to a planned
full load water line DWL of the ship 1. The sound device 3 is moved to the storage position on
the upper deck 2 e or the hull by rotating the arm 4 when the acoustic device 3 is stored by
rotating around the installed rotation axis 8 and the tip of the long portion 5 The portion 5a
extends toward the stern 2b or the bow 2a. At the time of acquisition of acoustic data in water by
the acoustic device 3, the arm 4 is moved to the outside of the hull 1 by the rotation of the arm 4
so that the long portion 5 extends in the depth direction of the vessel 1. The device 3 is
submerged and acoustic data is acquired by the submerged acoustic device 3. [Selected figure]
Figure 1
Sound data acquisition method for ships and ships
[0001]
The present invention relates to a ship and a method of acquiring acoustic data in a ship, and
more particularly to a ship and a method of acquiring acoustic data in a ship in which incidental
equipment is compact and an acoustic device can be arranged in water with simple operation.
[0002]
Conventionally, in the case of using an acoustic device such as a sonar, a sounding instrument, a
flow direction velocity meter, an acoustic positioning device, an acoustic communication device,
etc. in a ship, a method of constantly fixing the acoustic device to the bottom of the ship or
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underwater The descent method is adopted.
[0003]
This method of always fixing the acoustic device to the bottom of the ship does not require any
additional equipment for installing the acoustic device in the water, but the acoustic device is
always in the water, so the acoustic device breaks down. Risk is high and difficult to maintain
while sailing.
Furthermore, since the audio equipment is in a state of protruding from the bottom of the ship, it
is not suitable for a ship that is mounted on a mother ship and put into operation from the
mother ship and recovered and used by the mother ship.
In addition, since the acoustic device is located near the bottom of the vessel, the acoustic device
is susceptible to in-ship noise transmitted through the outer plate of the vessel and water flow
(bubble flow) including air bubbles generated near the vessel bottom during navigation. It is
difficult to get data.
[0004]
In order to solve this problem, a method has been proposed in which an acoustic device is
lowered into water using incidental equipment such as a deck crane and a boom (for example,
Patent Document 1). This method of lowering the sound equipment into water using a deck
crane, boom or the like accessory equipment can position the sound equipment on the ship when
the sound equipment is not used, so the risk of the sound equipment breakdown can be reduced.
It is also possible to carry out maintenance during navigation. However, incidental facilities such
as conventional deck cranes are not suitable for small vessels because they are large in size and
high in the center of gravity. In addition, in the conventional incidental equipment, the operation
of arranging the acoustic device in the water has many man-hours.
[0005]
The real fair 1-43658 gazette
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[0006]
The present invention has been made in view of the above circumstances, and an object thereof
is to provide a ship and a method of acquiring acoustic data of a ship, wherein an incidental
facility is compact and an acoustic device can be arranged in water by simple operation. It is.
[0007]
A ship according to the present invention for achieving the above object is provided with an arm
constituted by an elongated portion having an acoustic device at its tip end and a bent portion
connected to the elongated portion, and provided at the bent portion. And a pivoting mechanism
for pivoting the arm around the pivoting axis, wherein the pivoting mechanism pivots the arm to
place the acoustic device on the upper deck or in the storage position within the hull. When it is
moved, the tip of the long portion is in a state of extending toward the stern or bow side, and
when the arm is turned to expand the acoustic device into water The axial direction of the rotary
shaft is configured to be inclined with respect to the planned full load line of the vessel, the
planned draft line or the deck so that the length portion extends in the depth direction of the
vessel. I assume.
[0008]
In addition, preferably, when the planned full load water line DWL is not defined, it is set as a
planned water line, and in the case of a ship where these are not defined, it is set as a deck, but it
is not necessarily in this order.
[0009]
As described above, according to the ship of the present invention, it is possible to move the
acoustic device underwater with the very compact accessory equipment of the arm and the
rotation mechanism.
Therefore, it is particularly useful for small vessels.
Furthermore, when the acoustic device is stored, the acoustic device and the incidental
equipment can be moved to the storage position on the upper deck or in the hull, and since the
acoustic device is not out of the hull at the time of storage, the acoustic device is from the mother
ship It can be adopted as a ship which is mounted on the mother ship and operated from the
mother ship for collection and recovery to the mother ship without being disturbed at the time of
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the injection of the mother ship into the mother ship.
[0010]
Furthermore, by tilting the arm about the rotation axis by approximately 180 degrees by tilting
the axial direction of the rotation axis with respect to the planned full load line or the draft line
or deck of the ship, when storing the acoustic device, The distal end portion of the long portion
extends toward the stern side or the bow side, and when the acoustic device is deployed, the long
portion can be extended in the depth direction of the ship.
By this, even when the hull is small, it is possible to lengthen the long part regardless of the ship
width, and by making the long part long, the acoustic device is disposed at a deeper position
when the acoustic device is expanded. It becomes possible.
[0011]
More specifically, in a deployment apparatus for moving between a ship and water by rotating a
support having an acoustic device by 270 degrees in a substantially vertical plane only by singleaxis drive by a rotating shaft, in a row direction In the case of deployment and storage, the depth
to which the acoustic device can be lowered depends on the length of the column with the
acoustic device, which will be limited by the width of the ship, so In such a case, it may be
necessary to provide a telescopic mechanism or a multistage folding mechanism in the support
column portion of the deployment device, and the mechanism becomes complicated.
[0012]
Also, if the same deployment device is placed at the stern or bow and the direction of deployment
and storage of the support with the acoustic device is in the stern and bow direction, when
mounting and installing at the stern There is a fear that when loading and disposing on the bow,
there is a possibility that the operation will be hindered when the vessel is put in and taken out
of the mother ship.
[0013]
Therefore, by adopting a mechanism in which the axial direction of the rotating shaft is inclined
with respect to the planned full load waterline or the planned waterline or deck of the ship, as in
this method, the storage shaft can be substantially parallel to the longitudinal direction of the
hull Since this method is adopted, since the tip of the long part (support) having the acoustic
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device extends toward the stern or bow side, single-axis drive is achieved. Even with a simple
drive device according to the above, the long part having the acoustic device can be made longer
without being limited by the boat width.
[0014]
In the above-mentioned vessel, the storage of the acoustic device is configured to have an
inclination angle with respect to the planned full load water line or the planned water line or the
deck of the ship in the axial direction of the rotation axis within a range of 30 degrees to 60
degrees. Sometimes, the long part can be placed almost parallel to the planned load line or draft
line or deck, and when the acoustic device is deployed, the long part is almost perpendicular to
the planned load line or draft line or deck. It can be in the state of extending in the depth
direction.
This is advantageous for making the accessory equipment compact when storing the audio
device, and advantageous for placing the audio device at a deeper position when deploying the
audio device.
[0015]
In the above ship, when the sound device is configured to be located below the bottom of the hull
when the sound device is deployed in water, noise transmitted to the water outside the ship
through the outer panel of the sound device Also, since it becomes less susceptible to the
influence of water flow (bubble flow) containing air bubbles flowing into the bottom of the ship,
it becomes possible to acquire more accurate acoustic data.
[0016]
In the above-mentioned vessel, when the acoustic device is configured to be positioned outside
the heel side of the hull when the acoustic device is deployed in water, noise transmitted to the
water outside the ship through the outer panel of the vessel. Also, since it becomes less
susceptible to the influence of a water flow (bubble flow) containing air bubbles in the vicinity of
the ship bottom or the heel side, it becomes possible to acquire more accurate acoustic data.
[0017]
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In the above vessel, when the horizontal cross-sectional shape of a part or all of the submerged
portion of the arm when the acoustic device is deployed in water is formed in a streamlined
shape, the acoustic device is used while moving the vessel It is possible to reduce the drag (fluid
resistance) of water acting on the submerged part of the arm when doing so.
This reduces the flow of the eddy current and also reduces the generation of air bubbles, thereby
reducing the influence of noises when using the acoustic device during navigation, and also the
propulsion performance and maneuverability performance of the ship. It is advantageous to keep
high.
[0018]
In the above-mentioned vessel, when the acoustic device is developed in water by providing a
plurality of combinations of the arm, the rotating shaft, and the turning mechanism, the arm is on
the outer side of the respective heel sides of the both sides of the hull. It can also be configured
to move.
According to this configuration, by moving the arm to both sides, it is possible to further stabilize
the balance between the left and right of the ship when using the acoustic device while moving
the ship.
Furthermore, the arms of the two wings can reduce the rolling of the ship.
In addition, the arms of both arms function like skegs, so that it is possible to improve the
stability (course stability) of the vessel.
Further, when the audio equipment is disposed on the arms of both arms, triangulation by
operating the audio equipment at two points of both arms becomes possible, and the
measurement accuracy can be further enhanced.
[0019]
The acoustic data acquisition method of a vessel for achieving the above object comprises: an
arm comprising an elongated portion having an acoustic device at its tip and a bent portion
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connected to the elongated portion; Alternatively, the acoustic equipment is pivoted on a planned
draft line or a rotational axis installed at an angle with respect to the deck, and when the acoustic
equipment is stored, the acoustic equipment is stored on the upper deck or in the hull by the
rotation of the arm. To move the tip of the long portion toward the stern or bow side, and when
acquiring acoustic data in water by the acoustic device, the arm is turned by turning the arm. The
sound device is moved in the state of extending the long portion in the depth direction of the
ship, the sound device is submerged, and sound data is acquired by the submerged sound device.
.
[0020]
According to this method, it is possible to move the acoustic device into the water by means of a
very compact accessory such as an arm and a pivoting mechanism.
[0021]
According to the ship and ship acoustic data acquisition method of the present invention, it is
possible to move the acoustic device underwater with the extremely compact accessory
equipment of the arm and the pivot mechanism.
Therefore, it is particularly useful for small vessels.
Furthermore, when the acoustic device is stored, the acoustic device and the incidental
equipment can be moved to the storage position on the upper deck or in the hull, and since the
acoustic device is not out of the hull at the time of storage, the acoustic device is from the mother
ship It does not get in the way when putting in the ship or getting it back to the mother ship.
[0022]
In particular, the arm having the acoustic device is stored so as to be substantially parallel to the
longitudinal direction of the hull with the tip of the long portion extending toward the stern side
or the bow side, so the ship width is short. There is an advantage that it can be adopted also in a
ship.
[0023]
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It is a ship of a 1st embodiment concerning the present invention, and is a perspective view
showing typically the state where acoustic equipment is stored.
It is a perspective view which shows typically the state which expanded the audio equipment in
the ship of FIG. It is a side view which shows the state which accommodated the acoustic
apparatus in the ship of FIG. It is a side view which shows the state which expand ¦ deployed the
audio equipment in the ship of FIG. It is sectional drawing which shows the state which
accommodated the acoustic apparatus in the ship of FIG. 1 from a plain view. It is sectional
drawing which shows the state which expand ¦ deployed the audio equipment in the ship of FIG.
1 by a plain view. It is sectional drawing which shows typically the state which expand ¦ deployed
the acoustic equipment in the ship of 2nd Embodiment which concerns on this invention by a
plain view. It is a side view showing typically the state where the acoustic equipment in the vessel
of a 3rd embodiment concerning the present invention was stored.
[0024]
Hereinafter, the ship of the embodiment concerning the present invention is explained, referring
to drawings. In the drawings, the X direction is the length direction of the ship, the Y direction is
the width direction of the ship, and the Z direction is the depth direction of the ship. 1 to 6 are
for the purpose of explanation, and are omitted in the actual ship provided with a weir on the
weir side extending above the deck and the like. In addition, the ratio of each dimension does not
reflect the size of the actual ship.
[0025]
As shown in FIGS. 1 to 6, the ship 1 according to the embodiment of the present invention
includes an elongated portion 5 having an acoustic device 3 at its tip and a bent portion 6
connected to the elongated portion 5. The arm (post) 4, the rotation shaft 8 provided at the
bending portion 6, and the rotation mechanism 9 for rotating the arm 4 around the rotation shaft
8 by about 180 degrees. The axial direction of the rotating shaft 8 is arranged to be inclined with
respect to the planned full load draft DWL (or the planned draft or deck) of the ship 1. The
acoustic device 3 is a sonar, a sounder, a flow direction velocity meter, an acoustic positioning
device, an acoustic communication device, etc. which are used by being disposed in water. In
addition, it is preferable to set it as a plan draft line when the plan full load water line DWL is not
defined, and to set it as a deck in the case of the ship in which these are not defined, but it is not
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necessary to choose in this order. Or it may be a plan draft line or deck. In the following
description, it is assumed that the planned full load line DWL.
[0026]
The pivoting mechanism 9 of this embodiment is constituted by a support that pivotally connects
the rotation shaft 8 and is disposed on the heel side 2c on the upper deck 2e. The inclination
angle θ with respect to the planned full load draft line DWL of the ship 1 in the axial direction of
the rotation shaft 8 is set to 45 degrees. The long portion 5 is formed in a rod-like shape, and the
acoustic device 3 is disposed at the distal end portion 5 a of the long portion 5. In the drawing,
the acoustic device 3 is disposed inside the distal end portion 5 a of the elongated portion 5, but
depending on the structure of the acoustic device 3, the acoustic device 3 may be exposed in a
form connected to the distal end portion 5 a Good. Further, one end of the bending portion 6 is
connected to the rear end of the long portion 5, and the rotating shaft 8 is provided at the other
end of the bending portion 6.
[0027]
As shown in FIG. 1, FIG. 3 and FIG. 5, when the ship 1 stores the acoustic device 3 on the upper
deck 2e, the tip 5a of the long portion 5 faces the stern 2b side and is substantially in the boat
length direction The elongated portion 5 and the bending portion 6 are positioned above the
rotation shaft 8. In this embodiment, the long portion 5 is disposed substantially parallel to the
upper deck 2e and substantially parallel to the heel side 2c. The incidental equipment composed
of the acoustic device 3, the rotation mechanism 9, the rotation shaft 8 and the arm 4 does not
protrude outside the hull of the ship 1, and is in a state of being accommodated inside the hull.
[0028]
As shown in FIG. 2, FIG. 4 and FIG. 6, when expanding the acoustic device 3 into water, the arm 4
is turned from the inner side of the heel side 2c of the hull by turning the arm 4 around the
rotation axis 8. Move upward and move outside the heel side 2c. And the long part 5 will be in
the state extended in the depth direction (Z direction) of the ship 1, and the acoustic equipment 3
will be in the state located in water. Although the water depth D1 in which the audio equipment
3 is arrange ¦ positioned can be suitably determined according to the kind of audio equipment 3,
the measurement precision requested ¦ required, etc., Specifically, it is about 1 m-about 5 m.
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[0029]
That is, in the state in which the acoustic device 3 is stored, the bending portion 6 is disposed in
a state in which the tip portion 5 a of the long portion 5 extends toward the stern 2 b side, and
the bending portion 6 is pivoted around the rotation axis 8 In a state in which the acoustic device
3 is deployed in water, the long portion 5 is formed in a bent shape so as to extend in the depth
direction of the ship 1.
[0030]
The arm 4 is sized to fit inside the hull, and in a state where the acoustic device 3 is deployed in
water, the acoustic device 3 is formed so as to be able to be disposed at the depth of use.
Specifically, for example, when the maximum length of the length direction (X direction) of the
arm 4 in a state in which the acoustic device 3 is stored is shorter than the length of the ship 1
and the acoustic device 3 is deployed in water The device 3 is configured to be able to be placed
at the depth of use.
[0031]
In this embodiment, the arm 4 is configured such that when the acoustic device 3 is deployed in
water, the acoustic device 3 is positioned below the bottom 2 d of the hull. Since this
arrangement makes the acoustic device 3 less susceptible to noise transmitted through the outer
plate of the ship into the water on the outside of the ship and water flow (bubble flow) containing
air bubbles flowing into the ship bottom 2d, more accurate acoustic data can be obtained. It
becomes possible to acquire. The vertical distance D2 between the acoustic device 3 and the
bottom 2d of the hull is preferably about 0.5 m to 1.5 m. When the vertical distance D2 is in the
above range, the arm 4 can be made compact while securing a sufficient distance between the
acoustic device 3 and the bottom 2d.
[0032]
Furthermore, when the acoustic device 3 is deployed in water, the arm 4 is configured such that
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the acoustic device 3 is positioned outside the heel side 2c of the hull. In this arrangement, the
acoustic device 3 is less affected by noise transmitted through the outer plate of the ship into the
water of the ship and water flow (bubble flow) including air bubbles in the vicinity of the ship
bottom 2d and the weir side 2c. It becomes possible to acquire high acoustic data.
[0033]
Further, in this embodiment, when the acoustic device 3 is developed in water, the horizontal
cross-sectional shape of a part or all of the submerged portion 7 of the arm 4 (long portion 5) is
made streamlined (wing-like shape) It is formed. As a result, when using the acoustic device 3
while moving the ship 1, the generation of vortices in the submerged portion 7 of the arm 4 can
be suppressed, and the drag (fluid resistance) of water acting on the submerged portion 7 of the
arm 4 Can be reduced. As a result, when using the acoustic device 3 during navigation, the
influence of noise due to the eddy current is reduced, and it is advantageous to keep the
propulsion performance and the steering performance of the ship 1 high. When the acoustic
device 3 is disposed at the tip (outside) of the long portion 5, for example, a streamlined
waterproof cover may be fitted outside the acoustic device 3.
[0034]
Next, a method of acquiring acoustic data by the ship 1 will be described below. First, with the
acoustic device 3 and the arm 4 stored on the upper deck 2e, the acoustic device 3 is moved to
the water area where it is used. Specifically, the distal end portion 5a of the long portion 5
extends toward the stern 2b. The acoustic device 3 and the incidental equipment (arm 4, rotation
shaft 8 and rotation mechanism 9) are in a state of being accommodated inside the hull during
navigation to the use water area.
[0035]
When arriving at the water area where the acoustic device 3 is used and acquiring acoustic data
in water by the acoustic device 3, the arm 4 is moved to the outside of the hull by the rotation of
the arm 4 to submerge the acoustic device 3. Specifically, the arm 4 is turned about 180 degrees
around the rotation axis 8 so that the long part 5 is turned obliquely downward by the turning
mechanism 9 so that the long part 5 is on the heel side of the hull. It is moved to the outside of 2
c, and the long part 5 is extended toward the water in the depth direction of the ship 1. And by
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this, the acoustic apparatus 3 arrange ¦ positioned by the front-end ¦ tip part of the elongate part
5 is arrange ¦ positioned in use depth. Then, acoustic data is acquired by the submerged acoustic
device 3. When acquiring acoustic data while moving, the arm 4 is expanded to maintain the
submerged state of the acoustic device 3, and the acoustic device 3 acquires acoustic data while
moving the ship 1.
[0036]
When the acquisition operation of the acoustic data is completed, the acoustic device 3 is moved
onto the upper deck 2e by turning of the arm 4, and the acoustic device 3 and the incidental
equipment are stored. Specifically, the distal end portion 5a of the elongated portion 5 is
extended toward the stern 2b by pivoting the arm 4 in a direction opposite to that when the
pivoting mechanism 9 unfolds.
[0037]
As described above, according to the ship 1, the acoustic device 3 can be moved into water with a
simple operation by the very compact ancillary equipment such as the arm 4, the rotating shaft 8
and the turning mechanism 9. Therefore, it is particularly useful for small vessels, specifically, for
example, vessels having a total tonnage of about 1 to 20 tons. Furthermore, when the audio
device 3 is stored, the audio device 3 and the incidental equipment can be moved onto the upper
deck 2e, and when the audio device 3 is stored, the audio device 3 is not out of the hull. The
sound equipment 3 of the ship 1 does not get in the way at the time of injection of the ship or
recovery to the mother ship. Therefore, this method can also be adopted for a ship that is
mounted on a mother ship and operated by charging from the mother ship and recovery from
the mother ship.
[0038]
When storing without using the audio device 3, the audio device 3 and the incidental equipment
can be moved onto the upper deck 2e, so that the audio device 3 collides with components
outside the hull, and the audio device 3 Risk of incidental equipment failure can be reduced. In
addition, the audio device 3 and the incidental equipment can be stored in a non-submerged
state, and even if the audio device 3 or the arm 4 is broken or damaged, the audio device 3 and
the arm 4 and the rotation mechanism 9 can be quickly placed on the upper deck 2e. It is
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excellent in maintainability because it can be placed in
[0039]
Furthermore, by tilting the arm 4 around the rotation shaft 8 by tilting the axial direction of the
rotation shaft 8 with respect to the planned full load water line DWL, the tip of the long portion 5
is stored when the acoustic device 3 is stored. With the portion 5a extending toward the stern
2b, the long portion 5 can be extended in the depth direction of the vessel 1 when the acoustic
device 3 is deployed. By this, even when the hull is small and the boat width is short, the long
part 5 can be made longer, and the long part 5 can be made longer, so that the acoustic device 3
is positioned deeper when the acoustic device 3 is deployed. It becomes possible to arrange in
[0040]
In addition, when using the audio device 3, the audio device 3 can be arranged in the water by a
very simple operation of rotating the arm 4 around the rotation axis 8, so that it can be
compared to conventional ancillary equipment such as deck cranes and booms. Thus, it is
possible to avoid the worker's erroneous work and to reduce the burden. In addition, since the
work is simple, it can be easily automated, and can be adopted for unmanned vessels.
[0041]
Moreover, since the incidental facilities of the ship 1 are disposed at a lower position closer to
the hull as compared with the case where the conventional incidental facilities such as a deck
crane and a boom are lowered into water, the center of gravity of the ship 1 can be maintained
low. . Therefore, it is possible to make the ship 1 with high stability and stability. Furthermore,
even when the arm 4 is rotated, the long portion 5 always moves at a low position, so the center
of gravity of the ship 1 can be maintained low, and deployment and storage are performed
without losing stability against rolling. be able to.
[0042]
As in this embodiment, a configuration in which the inclination angle θ with respect to the
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planned full load water line DWL of the ship 1 in the axial direction of the rotation shaft 8 is
inclined in the range of 30 degrees to 60 degrees, preferably 40 degrees to 50 degrees. Then, the
long portion 5 can be disposed substantially parallel to the upper deck 2e when the acoustic
device 3 is stored, and the long portion 5 is substantially perpendicular to the upper deck 2e
when the acoustic device 3 is deployed. It can be in the state of extending in the depth direction
of 1. This is advantageous for making the incidental equipment compact when storing the audio
device 3, and advantageous for arranging the audio device 3 at a deeper position when deploying
the audio device 3.
[0043]
FIG. 7 shows a boat 1A according to a second embodiment of the present invention. The ship 1A
includes a plurality of combinations of the arm 4, the rotation shaft 8 and the rotation
mechanism 9. Then, when the acoustic device 3 is deployed in the water, the arms 4 are
configured to move to the outside of the respective heel sides 2c of the two hulls of the hull. In
this embodiment, the acoustic devices 3 are disposed at the tips of the arms 4 of the two arms.
The audio equipment 3 and the incidental equipment provided on the left and right heel sides 2c
are arranged in parallel in the boat length direction. The configuration of each of the acoustic
devices 3 and the incidental equipment, and the method of acquiring acoustic data by the vessel
1A are the same as those of the vessel 1 of the first embodiment described above.
[0044]
As in this embodiment, when the acoustic device 3 is deployed in water by providing a plurality
of combinations of the arm 4, the rotating shaft 8 and the turning mechanism 9, the arm 4 is on
the heel side of each of the both sides of the hull. If the configuration is such that the arm 4 is
moved to the outer side, it is possible to further stabilize the balance between the left and right of
the ship 1A when using the acoustic device 3 while moving the ship 1 by moving the arm 4 to
both sides. Furthermore, since the stability is improved to some extent by the arms 4 on both
sides, rolling of the vessel 1A can be reduced, which is particularly useful for small vessels. In
addition, the arms 4 of both arms function like a skeg, so that it is also possible to improve the
needle-retaining property (the course stability) of the ship 1A.
[0045]
Alternatively, the acoustic device 3 may be disposed only on the arm 4 of one side and the
acoustic device 3 may not be provided on the arm 4 of the other side, as in this embodiment,
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both If the acoustic device 3 is disposed on the arm 4 of the eyebrow, triangulation can be
performed by operating the acoustic device 3 at two points on both sides, and the measurement
accuracy can be further enhanced.
[0046]
The ship 1B of 3rd Embodiment which concerns on FIG. 8 at this invention is shown.
In this embodiment, the acoustic device 3 is connected to the outside of the tip of the arm 4 (long
portion 5). A waterproof cover 10 having a streamlined shape is externally fitted to the acoustic
device 3. A plurality of acoustic devices 3 are further incorporated in the long portion 5. The arm
4 (long portion 5) has an expandable and contractible portion 5b so that the length of the long
portion 5 can be changed.
[0047]
Further, in this embodiment, the audio device 3 and the incidental equipment are arranged at the
storage position 2f in the hull of the ship 1A at the time of storage, and the arm 4 is rotated to
store the audio device 3 When moved to 2 f, the tip 5 a of the long portion 5 is configured to
extend toward the bow 2 a. The inclination angle θ with respect to the planned full load draft
line DWL in the axial direction of the rotation shaft 8 is set to an angle larger than 60 degrees.
The other configuration and the method of acquiring acoustic data by the ship 1B are the same
as the ship 1 of the first embodiment shown above.
[0048]
If the arm 4 (long part 5) has the extension part 5b as in this embodiment and the length of the
long part 5 can be changed, when the acoustic device 3 is stored, the extension part 5b is used.
The contracted state makes it possible to make the arm 4 a compact size that fits inside the hull.
When the acoustic device 3 is deployed in water, the acoustic device 3 can be disposed at a deep
water depth by expanding the stretchable portion 5 b. Therefore, it is particularly useful when
the size of the vessel 1B is small or when it is necessary to arrange the acoustic device 3 in a
deep water depth. Moreover, since it becomes possible to change the water depth in which the
acoustic device 3 is disposed, for example, when a plurality of acoustic devices 3 are disposed on
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one arm 4 as in this embodiment, the respective acoustics are arranged. If the length of the long
part 5 is appropriately changed in accordance with the depth of use when using the device 3, it is
possible to use a plurality of audio devices 3 with one arm 4 at each suitable depth of use .
[0049]
The inclination angle θ of the axial direction of the rotating shaft 8 with respect to the planned
full load water line DWL of the ship 1 is preferably 30 degrees or more and 60 degrees or less,
preferably 40 degrees or more, when storing substantially parallel to the planned full load water
line DWL. It is preferable to make the storage position of the audio equipment nearly horizontal,
because it is preferable to make it inclined below 30 degrees, but as in this embodiment, the
inclination angle θ of the axial direction of the rotary shaft 8 with respect to the planned full
load line DWL of the ship 1 is 30 degrees The long portion 5 may be arranged to be inclined with
respect to the planned full load water line DWL at the time of storage of the acoustic device 3 in
a configuration inclining at an angle less than or greater than 60 degrees. May be arranged in an
inclined state with respect to the ship side 2c. In addition, when the acoustic device 3 is
deployed, the long portion 5 may extend in the depth direction of the ship 1 in a state of being
inclined with respect to the vertical direction of the planned full load water line DWL.
[0050]
1, 1A, 1B Vessel 2a Bow 2b Stern 2c Side 2d Bottom 2e Upper deck 2f Storage position 3 Audio
equipment 4 Arm 5 Long part 5a Tip part 5b Telescopic part 6 Flexion part 7 Water sink part 8
Rotation shaft 9 Rotation mechanism 10 Waterproof cover DWL plan full load draft line
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